Engine.



D. F. LLEWELLYN.

ENGINE.

APPLIEATION FILED JULY H. i916. pm@ www@ ma, 9, my.

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APPLICATION FILED JULY 11.1916.

15,2@256260 Patented @et 9, 1917.

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D. F. LLEWELLYN.

ENmNE.

' APPLICATION FLED JULY 11| 1915. LQQGB Patented Oat. 9,1917.

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DAV@ FRANKLIN LLEWELLYN, OF GIRARDVILLE, PENNSYLVANIA.

- ENGINE.

, Specification of Letters Patent.

Patented Unt. 9, 191'?.

Application led .T u1y 11, Serial No. 108,658.

To all 'whom t may concern.'

- Be it known that I, DAVID F. LLEWELLYN, a citizen of the UnitedStates, residing Girardville, in the county of Schuylkill and State ofPennsylvania, have invented new and useful Improvements in Engines, ofwhich the following isa specification.

This invention relates to engines of vthe class involving the use ofrotors, the main object of the present invention being to provide anengine embodying a plurality of rotors separately housed in casings, inone of which the mixture is drawn in and conipressed and in another ofwhich the mixture is exploded and exhausted, the mixture after beingdrawn in and compressed being transferred to the rotor chamberin whichthe fir- /ing and exhausting cycles are performed,

each of the rotors revolving continuously in itsv proper direction andthe timing ofthe rotors being positively regulated.

With the above and other objects in view, the invention consists in thenovel construction, combination and arrangement of` parts, as hereindescribed, illustrated and claimed.

In the accompanying drawings Figure 1 is a diametrical section throughan engine embodying the present invention.

Fig. 2 is a longitudinal section taken through the rotor chamber in vwhich the power and exhaust operations take` place, said view beingtaken on the line b-b of Fig. 1.

Fig. 3 is a similar section through the casing in 'which the intake andcompression operation take place, said view being taken on the line a-aof'Fig. 1.

Fig. 1 is a section on the line 0--0 of Fig. 1.

Fig. 5 is a section taken through the valve chamber.v

Fig. 6 is a side elevation of the Iengine looking toward the valve sidethereof.

Figs. 7 and 8 are diagrammatic views illustrating the intake andcompression operations. I

Fi s. 9 and 10 are similar views illustrat ing t e firing and exhaustingoperations.

Referring to the drawings A generally designates` the entire casing ofthe engine. In the preferred embodiment of the invention, said casing isdivided into three sections a, b and c, said sections being providedwith flanges to enable them to be firmly secured together by bolts 1 orthe equivalent thereof. The casings a and c are the rotor atA casingsandeach' of said casings is shown as water The casing a in which theintake.l and compresslon operations take place is provided wlth an inletport 3 and an outlet port 4, 5 designating a carbureter or mixer fromwhich an'explosive charge is drawn into the casing a. The casing a isconnected with the casing c by means of a transfer pipe or connection 4cwhich leads from the outlet lport 4 of the casing a to the inlet yport 6of the valve casing, the exhaust from the casing c passing outwardthrough an exhaustport 7.

In the casing a there are mounted two rotors 8 and 9, each of which isjournaled in the side walls of the casings and formed with jacketed at 2for the usual purpose.

a substantially semi-cylindrical abutment 10 i .terminating'in abutmentfaces 11 and 12 as clearly shown in Fig. 3.

The casing o also contains two rotors 13 and 14 formed with similarsemi-cylindrical abutments 15 corresponding in all respects with theabutments 10 in the casing a.

'The rotors 8 and 13 are mounted on a shaft 16 which is shown asprovided with a Hy wheel 17 and which forms the power shaft of theengine. The other rotors 9 and 14C are mounted on a shaft 18 parallel tothe shaft 16. These shafts 16 and 18 are journaled in suitable bearingsin the sectional casing hereinabove described and as shown in Fig. 1.

In the intermediate casing b, there are arranged two spur gears 19 and2()V fast respectively on the shafts 16 and '18, said gears 19 and 2Ointermeshing and thereby causing the rotors to operate with accuracywhile performing their functions. Upon the outer side of the casing cthere is arranged a housing 21 in )which is located a rotary `valve body22 having twoports 23 and 24 extending transverselyl through ythe same.'lhe valveI body 22 has a peripheral gear face 25 which meshes with andis driven by a gear 26 fast on the shaft 16. The gear 26 and "the gearface 25 are so proportioned that the rotary valve revolves once to everyrevolution of the rotors in the casing c. 27 represents a spark plug forigniting the charges in the casing c at the proper intervals.

In order to provide against leakage and in lorder toretain compressionin both the casings a and c, each rotor is formed in each side thereofwith an annular seat or groove 28 in which is arranged an annularpacking ring 29, springs 30 being interposed between the rings 29 toforce said rings laterally into contact with the inside -walls of therespective ca'sings. Each rotor also embodies an encircling packing'band31 having inclined faces 32 against which the inclined outer edges 33 ofthe packing rings 29 operate so that as the rings 29 are spread apart bythe action of the springs 30, the band 31 which is of the split varietyis also forced outwardly against the inner peripheral wall of the casingin which it operates. `In addition to the packing rings 29, otherpacking rings 34 are set into grooves in opposite sides of the body ofeach rotor, each of said rings being split and substantially V-shaped incross section as shown, thus forming an additional safeguard againstloss of compression.

From the foregoing description, taken in connection with theaccompanying drawings, the operation of the engine will now beunderstood. In the operation of the rotors 8 and 9, explosive mixture isdrawn into the casing a by the suction of the rotor 8 moving in thedirection of the arrow in Figs. 3 and 7 and during the completerevolution of the rotors 8 and 9 the charge of mixture is compressed andforced through the outlett from which it is transferred by the pipe 5 tothe intake port 6 of the valve casing 21. As shown in Figs. 4 and 5, thevalve is provided with two pockets 23 and 24 having packing rings 36 atopposite sides thereof which are carried by the valve and which bearagainst the adjacent walls of the valve casing 21. In each rotation ofthe valve 22, each of the pockets 23 and 24 thereof is filled withcompressed mixture, and as the.

valve revolves, the pockets 23 and 24C are successively brought intoregistry with the intake port 37 of the casing c when the rotors 13 and14 are in the positionshown in Figs. 2 and 9 and also whenin theposition shown in Fig. 10. In such positions, the charges are ignited bya suitable plug or igniter thereby driving the rotors 13 and 11iin thedirection indicated by the arrows in Figs. 9 and 10, the exhaust beingliberated through the port 7. In every half revolu.

tion of the rotors 13 and 14, the 'compressed mixture is prevented fromentering the casing 21 by means of the rotary valve 22 caused by theports 23' and 24 being at such time out of registry with the intake port6 of the casing 21. The ports 23 and 24 are of sufficient size andcapacity to hold sufficient charges of mixtureunder compression yaaeaeae outlet port, a second rotor casing atv the inner side of thefirst namedy casing having an intake port and an exhaust port both inthe outer side wall thereof, rotors mounted in the last named casing andadapted to be driven by the charge of compressed mixture l in the lastnamed casing and also adapted to force the burned gases outwardlythrough the exhaust port thereof, means for supplying lexplosive mixture'to the first named casing, a conduit connecting the outlet port of thefirst named casing with the inlet port of the second casing, a valvecontrolling the intake port to the second casing` and actuated by theengine shaft, shafts on which said rotors are mounted, and intermeshingtwin gears on said shafts between the rotor casings whereby the rotorsare simultaneously driven in opposite directions at the same 2. In anengineof the class described, a rotor'casing having an inlet port and an'outlet port in its outer side wall, rotors working in said casing andadapted to draw in a charge of explosivel mixture, compress the same andexpel it through the outlet port, a second rotor casing having an intakeport and an exhaust, port in its outer side wall, rotorsmounted in thelast named casing and ladapted to be driven by the charge of compressedmixture in the last named casing and also adapted to force the burnedgases outwardly through the exhaust port thereof, means for supplyingexplosive mixture to the first named casing, a valve controllin theintake port of the second casing, said valve being actuated by theengine shaft, a transfer pipe connecting the outlet port of the firstcasing with the inlet port of the second casing and extending aroundboth casings, and a shaft driven valve arranged on the outer side of thesecond casing and adapted to receive the compressed mixture from saidtransfer connection carry said charge land releasethe same into theintake port of the second casing.

In testimony whereof I aiiix my signature.

DAVID FRANKLIN LLEWELLYN.

